Mentha is a genus of plants in the family Lamiaceae. The exact distinction between species is unclear; it is estimated that 13 to 24 species exist. Hybridization occurs naturally where some species range overlap. Many hybrids and cultivars are known.

Shelf Life:
If you keep them in the pantry or the refrigerator, then they can last for 5-7 days, but if the leaves are put into the freezer, then that may last to 2 to 3 years. Mint leaves can be ground, and dried leaves can be stored for 1-3 years, while the extract can last in the pantry for 4-5 years.